The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 1980
Filed:
Sep. 30, 1976
Applicant:
Inventors:
Nigel I Palmer, Lexington, MA (US);
Don O Grammer, Scituate, MA (US);
Assignee:
W. R. Grace & Co., Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429147 ; 156196 ; 264115 ; 264119 ; 264126 ; 264286 ;
Abstract
Battery separators with degradation resistant rib areas are produced from nonwoven mats of thermoplastic fibers by substantially fusing the fibers in raised regions of the mat. The fusion is progressively lessened toward the base of the rib. The rib is formed by the application of heat and pressure. The mat is also supplied with other important characteristics such as small pore size during treatment to compact its fibers.